Ok-Seok Jang

Title: Ok-Seok Jang: Innovator in Photoresist Technology

Introduction

Ok-Seok Jang is a notable inventor based in Gyeonggi-do, South Korea. He has made significant contributions to the field of photoresist technology, holding 2 patents that enhance the efficiency of photoresist stripping processes. His work is particularly relevant in the semiconductor industry, where precision and effectiveness are paramount.

Latest Patents

Jang's latest patents include a thinner composition and a method of stripping a photoresist using the same. The thinner composition is effective in removing a variety of photoresists and includes propylene glycol mono-methyl ether acetate, ethyl 3-ethoxy propionate, and at least one of γ-butyrolactone and propylene glycol mono-methyl ether. This composition can selectively strip a photoresist coated on the backside and edge portion of a substrate, as well as a photoresist coated on the whole front surface of the substrate. Additionally, he has developed a photoresist stripper composition made up of a mixture of an acetic acid ester, γ-butyrolactone (GBL), and a non-acetate ester or a poly alkyl alcohol derivative. The acetic acid ester may include n-butyl acetate, amyl acetate, ethyl aceto-acetate, and isopropyl acetate, while the non-acetate ester may consist of ethyl lactate, ethyl-3-ethoxy propionate, and methyl-3-methoxy. The poly alkyl alcohol derivative may include propylene glycol monomethyl ester and propylene glycol monomethyl ester acetate.

Career Highlights

Ok-Seok Jang is currently employed at Samsung Electronics Co., Ltd., where he continues to innovate in the field of photoresist technology. His work has been instrumental in advancing the capabilities of photoresist stripping processes, which are critical in semiconductor manufacturing.

Collaborations

Throughout his career, Jang has collaborated with notable colleagues, including Seung-Hyun Ahn and Sang-Mun Chon. These collaborations have fostered a productive environment for innovation and development in their respective fields.

Conclusion

Ok-Seok Jang's contributions to photoresist technology through his patents and work at Samsung Electronics Co., Ltd. highlight his role as a